Operating instructions Platform/floor scales

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KERN & Sohn GmbH

Ziegelei 1

D-72336 Balingen

email: [email protected]

Phone: +49-[0]7433- 9933-0 Fax: +49-[0]7433-9933-149 Internet: www.kern-sohn.com

Operating instructions Platform/floor scales

KERN EOB / EOE_L / EOE_XL / EOS

Version 3.0 07/2010 GB

EOB/EOE_L/EOE_XL/EOS-BA-e-1030

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GB KERN EOB / EOE_L / EOE_XL / EOS

Version 3.0 07/2010

Operating instructions Platform/floor scales

Table of Contents

1 Technical Specifications ... 4

2 Appliance overview ... 9

2.1 Overview of displays...11

2.2 Keyboard overview...11

3 Basic Information (General)... 12

3.1 Proper use...12

3.2 Improper Use ...12

3.3 Warranty ...12

3.4 Monitoring of Test Resources...13

4 Basic Safety Precautions ... 13

4.1 Pay attention to the instructions in the Operation Manual...13

4.2 Personnel training ...13

5 Transportation & Storage... 13

5.1 Testing upon acceptance ...13

5.2 Packaging / return transport ...13

6 Unpacking, Setup and Commissioning ... 14

6.1 Installation Site, Location of Use ...14

6.2 Unpacking and placing ...14

6.2.1 Scope of delivery / serial accessories ... 15

6.2.2 Assembly instructions for the use of the wall fixture ... 15

6.3 Mains connection ...16

6.4 Battery operation...16

6.5 Initial Commissioning ...16

7 Adjustment ... 17

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8 Operation... 18

Start-up...18

Switching Off ...18

Weighing ...18

Switch-over weighing unit...18

Taring ...19

Hold function (animal weighing function)...20

Plus/minus weighing...21

9 Menu ... 22

10 Service, maintenance, disposal... 23

10.1 Cleaning ...23

10.2 Service, maintenance...23

10.3 Disposal...23

11 Error messages, troubleshooting guide ... 23

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1 Technical Specifications Models KERN EOB

KERN EOB

15K5

EOB 35K10

EOB 60K20

EOB 60K20L

Readability (d) 5 g 10 g 20 g 20 g

Weighing range (max) 15 kg 35 kg 60 kg 60 kg

Reproducibility 5 g 10 g 20 g 20 g

Linearity ±10 g ±20 g ±40 g ±40 g

Recommended

adjustment weight, not added (class)

10 kg (M2)

20 kg (M2)

40 kg (M2)

40 kg (M2) Stabilization time (typical) 2.5 sec.

Warm-up time 10 min

Supply voltage 220 V- 240 V, AC 50 Hz

Power pack

secondary voltage 9V, 100 mA

Battery 6 x 1.5 V AA (=9V)

Battery operation period 220 h

Auto-Off 3 min

Weighing Units kg, lb

Ambient temperature + 10°C …+ 35°C

Humidity of air max. 80 % (not condensing) Display unit

(B x D x H) mm 210 x 110 x 45

Cable length display unit 180 cm 180 cm 180 cm 270 cm

Weighing surface mm 314.5 x 304.5 550 x 550

Weight kg (net) 4.2 13.5

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KERN EOB 150K50

EOB 150K50L

EOB 150K50XL

Readability (d) 50 g 50 g 50 g

Weighing range (max) 150 kg 150 kg 150 kg

Reproducibility 50 g 50 g 50 g

Linearity ±100 g ±100 g ±100 g

Recommended

100 kg (M2)

Warm-up time 10 min

Power pack

Battery 6 x 1.5 V AA (=9V)

Auto-Off 3 min

(B x D x H) mm 210 x 110 x 45

Cable length display unit 180 cm 270 cm 270 cm Weighing surface mm 314.5 x 304.5 550 x 550 945 x 505

Weight kg (net) 4.2 13.5 19.5

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KERN EOB 300K100A

EOB 300K100L

EOB 300K100XL

Readability (d) 100 g 100 g 100 g

Weighing range (max) 300 kg 300 kg 300 kg

Reproducibility 100 g 100 g 100 g

Linearity ±200 g ±200 g ±200 g

Recommended

200 kg (M2)

Warm-up time 10 min.

Power pack

Battery (optional) 6 x 1.5 V AA (=9V)

Auto-Off 3 min

(B x D x H) mm 210 x 110 x 45

Cable length display unit 180 cm 270 cm 270 cm Weighing surface mm 314.5 x 304.5 550 x 550 945 x 505

Weight kg (net) 4.2 13.5 19.5

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Models KERN EOE

KERN EOE

150K50L

EOE 150K50XL

EOE 300K100L

EOE 300K100XL

Readability (d) 50 g 50 g 100 g 100 g

Weighing range (max) 150 kg 150 kg 300 kg 300 kg

Reproducibility 50 g 50 g 100 g 100 g

Linearity ±100 g ±100 g ±200 g ±200 g

Recommended

100 kg (M2)

200 kg (M2)

Power pack

Auto-Off 3 min

(B x D x H) mm 210 x 110 x 45

Cable length display unit 270 cm

Weighing surface mm 505 x 505 945 x 505 505 x 505 945 x 505

Weight kg (net) 12.5 19.5 12.5 19.5

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Models KERN EOS

KERN EOS

150K50XL

EOS 300K100XL

Readability (d) 50 g 100 g

Weighing range (max) 150 kg 300 kg

Reproducibility 50 g 100 g

Linearity ±100 g ±200 g

Recommended

100 kg (M2)

Power pack

Auto-Off 3 min

(B x D x H) mm 210 x 110 x 45

Cable length display unit 270 cm

Weighing surface mm 900 x 550 900 x 550

Weight kg (net) 18.8 18.8

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2 Appliance overview

Models EOB

Weighing plate, stainless steel

Models EOE

Weighing plate varnished steel

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Models EOS

• Weighing plate, stainless steel

• Anti-slip rubber mat

Comfortable transport due to 2 rollers and 1 grab handle

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2.1 Overview of displays

No. Description

1 Is displayed, when the battery capacity is exhausted.

2 Balance zero display:

Should the balance not display exactly zero despite empty scale pan, press the TARE button. The balance will be set to zero after a short standby time.

3 Stability display:

If the display shows the stability display [ο] the balance is in a stable status. The [ο] indication disappears if the condition is unstable.

4 Hold/animal weighing function active, see chap. 9

5 Weighing unit [kg ' lb], see chap. 8 „Switch-over weighing unit“

6 Stored tare value, see chap. 8 „Taring“

2.2 Keyboard overview

Key Function

Turn on/off balance

Hold/ animal weighing function Tare balance

Switch-over weighing unit

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3 Basic Information (General) 3.1 Proper use

The balance you purchased is intended to determine the weighing value of material to be weighed. It is intended to be used as a “non-automatic“ balance, i.e. the material to be weighed is manually and carefully placed in the centre of the weighing plate. As soon as a stable weighing value is reached the weighing value can be read.

3.2 Improper Use

Do not use balance for dynamic add-on weighing procedures, if small amounts of goods to be weighed are removed or added. The “stability compensation“ installed in the balance may result in displaying an incorrect measuring value! (Example: Slowly draining fluids from a container on the balance.)

Do not leave permanent load on the weighing plate. This may damage the measuring system.

Impacts and overloading exceeding the stated maximum load (max) of the balance, minus a possibly existing tare load, must be strictly avoided. Balance may be damage by this.

Never operate balance in explosive environment. The serial version is not explosion protected.

The structure of the balance may not be modified. This may lead to incorrect weighing results, safety-related faults and destruction of the balance.

The balance may only be used according to the described conditions. Other areas of use must be released by KERN in writing.

3.3 Warranty

Warranty claims shall be voided in case

• Our conditions in the operation manual are ignored

• The appliance is used outside the described use

• The appliance is modified or opened

• Mechanical damage or damage by media, liquids, natural wear and tear

• The appliance is improperly set up or incorrectly electrically connected

• The measuring system is overloaded

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3.4 Monitoring of Test Resources

In the framework of quality assurance the measuring-related properties of the balance and, if applicable, the testing weight, must be checked regularly. The responsible user must define a suitable interval as well as type and scope of this test.

Information is available on KERN’s home page (www.kern-sohn.com with regard to the monitoring of balance test substances and the test weights required for this. In KERN’s accredited DKD calibration laboratory test weights and balances may be calibrated (return to the national standard) fast and at moderate cost.

4 Basic Safety Precautions

4.1 Pay attention to the instructions in the Operation Manual

Carefully read this operation manual before setup and commissioning, even if you are already familiar with KERN balances.

4.2 Personnel training

The appliance may only be operated and maintained by trained personnel.

5 Transportation & Storage 5.1 Testing upon acceptance

When receiving the appliance, please check packaging immediately, and the appliance itself when unpacking for possible visible damage.

5.2 Packaging / return transport

Ö Keep all parts of the original packaging for a possibly required return.

Ö Only use original packaging for returning.

Ö Prior to dispatch disconnect all cables and remove loose/mobile parts.

Ö Reattach possibly supplied transport securing devices.

Ö Secure all parts such as the glass wind screen, the weighing platform, power unit etc. against shifting and damage.

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6 Unpacking, Setup and Commissioning 6.1 Installation Site, Location of Use

The balances are designed in a way that reliable weighing results are achieved in common conditions of use.

You will work accurately and fast, if you select the right location for your balance.

Therefore, observe the following for the installation site:

• Place the balance on a firm, level surface;

• Avoid extreme heat as well as temperature fluctuation caused by installing next to a radiator or in the direct sunlight;

• Protect the balance against direct draughts due to open windows and doors;

• Avoid jarring during weighing;

• Protect the balance against high humidity, vapours and dust;

• Do not expose the device to extreme dampness for longer periods of time.

Non-permitted condensation (condensation of air humidity on the appliance) may occur if a cold appliance is taken to a considerably warmer environment.

In this case, acclimatize the disconnected appliance for ca. 2 hours at room temperature.

• Avoid static charge of goods to be weighed or weighing container.

If electro-magnetic fields or static charge occur, or if the power supply is unstable major deviations on the display (incorrect weighing results) are possible. In that case, the location must be changed.

6.2 Unpacking and placing

Open package, take out the appliance and accessories. Verify that there has been no damage and that all packing items are present.

The balance must be installed in a way that the weighing plate is exactly in horizontal position.

Mount the display unit in a way that facilitates operation and where it is easy to see.

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6.2.1 Scope of delivery / serial accessories

• Platform and display unit, (see chap. 2)

• 4 x adjustment feet (excepted platform size 314.5 x 304.5 cm)

• Mains power supply

• Wall fixture (with fixing screws)

• Operating instructions

6.2.2 Assembly instructions for the use of the wall fixture

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6.3 Mains connection

Power is supplied via the external mains adapter. The stated voltage value must be the same as the local voltage.

Only use original KERN mains adapters. Using other makes requires consent by KERN.

6.4 Battery operation

On the rear side of the display unit remove the battery cover and connect 6 x 1.5V mignon cells. Reinsert the battery cover.

In order to save the battery, the balance switches automatically off after 3 minutes without weighing. Further shutdown times can be set in the Menu (Function "A.OFF"), see Section 9.

If the batteries are exhausted, the battery symbol will appear (see chap. 2.1). Switch- off balance and replace batteries at once.

If the balance is not used for a longer time, take out the batteries and store them separately. Leaking battery liquid could damage the balance.

6.5 Initial Commissioning

In order to obtain exact results with the electronic balances, your balance must have reached the operating temperature (see warming up time chap. 1). During this warming up time the balance must be connected to the power supply (mains, accumulator or battery).

The accuracy of the balance depends on the local acceleration of gravity.

Strictly observe hints in chapter Adjustment.

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7 Adjustment

As the acceleration value due to gravity is not the same at every location on earth, each balance must be coordinated - in compliance with the underlying physical weighing principle - to the existing acceleration due to gravity at its place of location (only if the balance has not already been adjusted to the location in the factory). This adjustment process must be carried out for the first commissioning, after each

change of location as well as in case of fluctuating environment temperature. To receive accurate measuring values it is also recommended to adjust the balance periodically in weighing operation.

Observe stable environmental conditions. A warming up time (see chapter 1) is required for stabilization.

Ö In weighing mode press the UNIT key and keep it pressed until „CAL“ followed by the weight value of the required adjustment weight in displayed. „LOAd“ is

displayed alternatively.

Ö Ù

Example Ö Carefully place the required adjustment weight (see tab. 1 „Technical data“) in

the centre of the weighing plate

Press TARE key, adjustment is started.

Ö

Ö Wait until the stability display appears, after that the adjustment is finished. The balance will automatically return to Weighing mode upon successful completion of the adjustment and will display the weight of the adjustment weight.

Ö Take away adjustment weight.

An error message will be displayed in the event of an adjustment error or incorrect adjustment weight. Remove the adjustment weight and repeat the adjustment process.

Keep the adjustment close to the balance. Daily control of the weighing exactness is recommended for quality-relevant applications.

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8 Operation

Start-up Ö Press the ON/OFF key.

The balance will carry out a self-test. The balance is ready for weighing when the weight display appears.

Should the balance not display exactly zero despite empty weighing plate, press the TARE button. The balance will be set to zero after a short standby time.

Switching Off Ö Press ON/OFF button, the display disappears

Weighing Ö Place goods to be weighed on balance Ö Wait for stability display

Ö Read weighing result.

Switch-over weighing unit

Ö By pressing the UNIT button the weighing result can be displayed in another unit [kg ' lb].

Unit conversion: 1 kg = 2.20462 lb

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Taring Ö Place an empty weighing container, the weight of the weighing container will be displayed.

Ö Press the TARE button, the zero display disappears. The indicator [S] under [NET] is displayed. The tare weight is saved until it is deleted.

Ø

Ö Weigh the material, the net weight will be indicated.

The taring process can be repeated any number of times, e.g. when adding several components for a mixture (adding). The limit is reached when the whole weighing range is exhausted.

The weight of the weighing container will be displayed as a minus number after removing the weighing container.

The tare weight is saved until it is deleted.

Delete tare Ö Unload the balance and press the TARE button, the zero display appears.

Ø

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Hold function (animal weighing function)

The balance has an integrated animal weighing function (mean value calculation). Using this function it is possible to weigh domestic or small animals exactly (min. load 1% of the max.

one), although they do not stand quiet on the weighing plate.

Ö Put upon weighing goods and press the HOLD key. In the display the indicator [S] starts flashing. During this time the balance takes up several measured values and displays then the calculated mean value.

Ø

Ö This value remains in the display until the HOLD button is pressed again. The indicator [S] under [HOLD] goes out, the balance returns into normal weighing mode.

Ö Press the HOLD button once more to repeat this function as often as required.

There is no average value calculation in the event of too much movement (heavy display oscillation).

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Plus/minus weighing

Ö For example for item weight check, production check etc.

switch-on the balance using ON/OFF button and wait for zero display.

Ö Put the nominal weight on the weighing plate and tare to zero using TARE key. Remove the nominal weight.

Ø

Ö Put the test objects subsequently on the weighing plate, the respective deviation from the nominal weight is displayed with the respective sign to „+“ and „-“ (e.g. + 0.037 g).

According to the same procedure also packages with the same weight can be produced, referring to a nominal weight.

Ö Back to weighing mode by pressing the TARE button.

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9 Menu

Changes are only allowed on the functions (weighing units) and (automatic switch-off function).

Ö In weighing mode keep TARE button depressed for approx. 3 sec until "SETUP"

is displayed followed by "UNIT"

Ö Press the HOLD button as often as necessary until the required function is displayed.

Ö Press the TARE button to confirm the selected function. The current setting will be displayed. Using the HOLD or TARE button, select the desired

parameter. Use the HOLD button to return to the menu.

Ö To exit the Menu and save, press the HOLD button as often as required until

"END" is displayed and then confirm by pressing TARE. The balance returns automatically into weighing mode.

Navigation:

Not documented

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10 Service, maintenance, disposal 10.1 Cleaning

Before cleaning, disconnect the appliance from the operating voltage.

Please do not use aggressive cleaning agents (solvents or similar agents), but a cloth dampened with mild soap suds. Take care that the device is not penetrated by fluids and polish it with a dry soft cloth.

Loose residue sample/powder can be removed carefully with a brush or manual vacuum cleaner.

Remove spilled weighing goods immediately.

10.2 Service, maintenance

The appliance may only be opened by trained service technicians who are authorized by KERN.

Before opening, disconnect from power supply.

10.3 Disposal

Disposal of packaging and appliance must be carried out by operator according to valid national or regional law of the location where the appliance is used.

11 Error messages, troubleshooting guide

Error message Function

LO Capacity of batteries exhausted ERRE EEPROM error display unit ErrEd EEPROM error

Err Overload

ErrL Minimum weight under min. value

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In case of an error in the program process, briefly turn off the balance and disconnect from power supply. The weighing process must then be restarted from the beginning.

Help:

Fault Possible cause

• The balance is not switched on.

• The mains supply connection has been interrupted (mains cable not plugged in/faulty).

The displayed weight does not glow.

• Power supply interrupted.

• Draught/air movement

• Table/floor vibrations The displayed weight is permanently

changing

- • The weighing plate is in contact with

foreign matter.

• Electromagnetic fields / static charging (choose different location/switch off interfering device if possible)

• The display of the balance is not at zero

• Adjustment is no longer correct.

• The balance is on an uneven surface.

The weighing value is obviously wrong

• Great fluctuations in temperature.

• Electromagnetic fields / static charging (choose different location/switch off interfering device if possible)

Should other error messages occur, switch balance off and then on again. If the error message remains inform manufacturer.